What kind of sand is best to use for construction sand?
In the construction industry, sand selection is critical to the quality and durability of the project. Different sand types have different properties and are suitable for different construction scenarios. This article will combine the hot topics and hot content on the Internet in the past 10 days, analyze the best choice of sand for construction, and provide structured data for reference.
1. Main types of construction sand
Sand for construction is mainly divided into two categories: natural sand and machine-made sand. Here is their detailed comparison:
| type | source | Features | Applicable scenarios |
|---|---|---|---|
| natural sand | river sand, sea sand, mountain sand | The particles are round, low in mud content and high in strength. | Concrete, masonry, plastering |
| Machine-made sand | Rock crushing processing | Particles with many edges and corners, controllable gradation, low cost | Roadbed, precast components, dry mix mortar |
2. The best choice for construction sand
Based on recent industry discussions and expert advice,river sandConsidered the best choice for construction sand, the main reasons are as follows:
1.Good particle shape: After long-term erosion by water flow, river sand has rounded particles, which is beneficial to the workability and strength of concrete.
2.Low mud content: The mud content of river sand is usually controlled below 3%, which meets the standards for construction sand.
3.Rich resources: River sand is widely distributed in my country, and the mining cost is relatively low.
However, due to the tightening of environmental protection policies, the mining of river sand has been restricted, and machine-made sand has gradually become an alternative. The following is a performance comparison between the two:
| Performance indicators | river sand | Machine-made sand |
|---|---|---|
| particle shape | mellow | Many edges and corners |
| Mud content | ≤3% | ≤5% |
| strength | high | higher |
| cost | higher | lower |
3. Quality Standards for Construction Sand
According to the national standard "Construction Sand" (GB/T 14684-2022), the quality of construction sand should meet the following requirements:
| index | Require |
|---|---|
| Fineness modulus | 2.3-3.0 (China and Saudi Arabia) |
| Mud content | ≤5% |
| Robustness | ≤10% (quality loss) |
| Chloride ion content | ≤0.06% |
4. Hot topic: Controversy over the use of sea sand
Recently, the use of sea sand has become a hot topic in the construction industry. Although sea sand is rich in resources, it contains chlorine salts, which may corrode steel bars and cause project quality problems. The following is a comparison of sea sand and river sand:
| Comparative item | sea sand | river sand |
|---|---|---|
| Chloride ion content | High (needs to be diluted) | Low |
| cost | Low | high |
| applicability | Need to be handled strictly | Use directly |
5. Conclusion
Taken together,river sandIt is still the best choice for construction sand, but when resources are tight, machine-made sand can be an environmentally friendly alternative. Sea sand needs to be used with caution and must be strictly desalinated. When selecting sand, construction companies should strictly follow national standards to ensure project quality.
It is hoped that the analysis of this article can provide valuable reference for practitioners in the construction industry.
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